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Author Topic: Q*bert. A man and his grail... FINISHED !!!  (Read 272744 times)

level42

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Re: Q*bert. A man and his grail...
« Reply #120 on: January 14, 2015, 11:52:48 PM »
Nice....almost all the original PCB supports are still there.......patiently waiting to hold some original boards again !

Another nice shot of the wonderful cabling....:D

I actually like this shit, because it feels so thankful when you remove it and restore it :)
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level42

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Re: Q*bert. A man and his grail...
« Reply #121 on: January 14, 2015, 11:55:14 PM »
Another thing that I'll remove ASAP....a switching power supply. If it works, it's nice to add to the stack ;)

Not much bad stuff here.....you see where the monitor needs to be mounted on the right side.
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level42

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Re: Q*bert. A man and his grail...
« Reply #122 on: January 14, 2015, 11:59:10 PM »
So how do you connect the mains to the Switcher ? Of course...like this..... :roll:

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level42

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Re: Q*bert. A man and his grail...
« Reply #123 on: January 15, 2015, 12:01:12 AM »
1)THANKFULLY, they left the original PSU inside !!!

Would have cost a ton to have it shipped from the US if needed.....(think I would have gone "switcher" way in that case..)

2) PFewwwwwwhhh, where do I begin ?
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level42

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Re: Q*bert. A man and his grail...
« Reply #124 on: January 15, 2015, 12:03:54 AM »
1) Thankfully also, in a lot of cases they were very lazy and simply made Y-taps on the original harness.....that is in fact good news for me !

2) More hacking done on the original PSU.....why on earth would you bother to actually put the replacement fuse holder on it's original position on the PSU frame. That would mean unscrewing the entire PSU...."hah, we don't have time for that !"

And look at those soldering skills.......argh.
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level42

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Re: Q*bert. A man and his grail...
« Reply #125 on: January 15, 2015, 12:05:45 AM »
1) Original mains plug still there. No use here and also...it looks very bad.

2) Mmmmm.........that looks very safe in the mains wire !
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level42

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Re: Q*bert. A man and his grail...
« Reply #126 on: January 15, 2015, 12:07:32 AM »
More details of the hacks....and yet....most of the original connectors are still there !
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level42

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Re: Q*bert. A man and his grail...
« Reply #127 on: January 15, 2015, 12:09:25 AM »
1) Here's one missing clearly. Turns out these are the CP contacts.....they had "extended" them to the JAMMA connector.

2) OK.......I understand the hacks......but I don't understand this....why just cut this ??
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Laszo

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Re: Q*bert. A man and his grail...
« Reply #128 on: January 15, 2015, 12:22:52 AM »
Nice to see so much love going into this cab. Great you take the time to let us enjoy your progress.

Maybe I' m strange but I often wonder seeing these hacks.... What kind of person works that way and is it saying anything about him ..... Somebody should get a PhD on that  :lol:  :'(
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level42

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Re: Q*bert. A man and his grail...
« Reply #129 on: January 15, 2015, 12:30:43 AM »
It's simple. Operators don't have money for good techs. So some half-assed tech hacks around and delivers something that works very quickly. Well kinda works ;)

However.....this may all look and sound bad, but it actually is not that bad at all.....I'm really happy as I can easily rescue the harness and all the rest.

The PSU is 100% 115VAC however and I'll have to use a step-down (inside of course).

All on all, I'm pretty exited....it's better than I expected !

More tomorrow !
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Etienne MacGyver

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Re: Q*bert. A man and his grail...
« Reply #130 on: January 15, 2015, 07:20:41 AM »
It Always amaze me when i see that, but i agree with you, its easier to fix it like this instead of when they cutt off all connectors and throw them in the bin.

Its all there exept for the CP connector.

You have the Alu serial decal AFAIK since Januari 2012  ;D
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Re: Q*bert. A man and his grail...
« Reply #131 on: January 15, 2015, 10:47:56 AM »
The most satisfying jobs are the ones where you "just" have to undo the shitty jobs of your predecessor (or do them properly), it's much less work than to replace missing parts or repair damaged parts. Especially missing wiring can be hell on earth. :)
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Re: Q*bert. A man and his grail...
« Reply #132 on: January 15, 2015, 11:18:46 AM »
Quote from: Level42 on January 15, 2015, 12:30:43 AM
The PSU is 100% 115VAC however and I'll have to use a step-down (inside of course).

i was trying to convert the powersupply of my qbert to 230 volts primary... however it did not work...
according to the schematics there are 2 coils 115v each connected on _each end_ in the original 115v vac version... (see pic 1)
my thinking was to connect the two coils on one end (like on atari-transformers with the power-plug) and feed on 230vac on the 2 remaining ends...
after unsoldering the connections of the two coils on the transformer (they are well marked) i checked if they are really seperated coils in the transformer... and yes---they are.
soldered the wires like in pic 2

giving 230vac blew the fuse of my room (not the f1 in the schematics?)
maybe somebody here knows where the error in my thinking is?



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level42

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Re: Q*bert. A man and his grail...
« Reply #133 on: January 15, 2015, 11:32:32 AM »
Mmmm, good thinking !

My guess is that the common is maybe connected to the ground in some way through the mains filter.....so you'd short one side of the 230Vac to ground :)

[Edit].......mmmm....Nahh....that can't be it right ?
« Last Edit: January 15, 2015, 11:35:56 AM by Level42 »
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level42

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Re: Q*bert. A man and his grail...
« Reply #134 on: January 15, 2015, 11:41:51 AM »
Did you still have anything hooked up to the secondary side of the transformer while you tried that ?
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